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    • 22. 发明申请
    • Downhole tool and method
    • 井下工具及方法
    • US20050045344A1
    • 2005-03-03
    • US10929345
    • 2004-08-26
    • Simon FraserWilliam Brown-KerrJohn Knight
    • Simon FraserWilliam Brown-KerrJohn Knight
    • E21B47/18E21B33/12
    • E21B47/187
    • The invention relates to a downhole tool for generating a fluid pressure pulse, and to a method of generating a fluid pressure pulse downhole. In one embodiment of the invention, an improved downhole tool (10) and method for transmitting data signals from a downhole environment to surface is disclosed, the downhole tool (10) comprising a fluid actuated flow restrictor (22); a first fluid flow path (23) for flow of actuating fluid to actuate the flow restrictor (22); a second fluid flow path (25) for flow of actuating fluid to actuate the flow restrictor (22); and a control member (12) movable between a first closed position where the first fluid flow path (23) is closed and the second fluid flow path (25) is open, and a discrete second closed position where the first fluid flow path (23) is open and the second fluid flow path (25) is closed, for controlling actuation of the flow restrictor (22) to generate a fluid pressure pulse.
    • 本发明涉及一种用于产生流体压力脉冲的井下工具,以及一种产生井下流体压力脉冲的方法。 在本发明的一个实施例中,公开了一种改进的井下工具(10)和用于将数据信号从井下环境传送到地面的方法,所述井下工具(10)包括流体致动的限流器(22); 第一流体流动路径(23),用于致动流体以致动流量限制器(22); 第二流体流路(25),用于致动流体以致动流量限制器(22); 以及在第一流体流动路径(23)关闭的第一关闭位置和第二流体流路(25)之间可移动的控制构件(12)打开,以及离散的第二关闭位置,其中第一流体流路(23) )打开并且关闭第二流体流路(25),用于控制限流器(22)的致动以产生流体压力脉冲。
    • 23. 发明授权
    • Distributed database system with authoritative node
    • 具有权威节点的分布式数据库系统
    • US06442608B1
    • 2002-08-27
    • US09231929
    • 1999-01-14
    • John KnightThomas Anthony RodenDarrell Myers Shively, IIPauline ChenKavita Shekhar PatilSonny Bui
    • John KnightThomas Anthony RodenDarrell Myers Shively, IIPauline ChenKavita Shekhar PatilSonny Bui
    • G06F15173
    • H04L63/10
    • An authorizing apparatus for use with a client that connects to a first server in a network is described. The authorizing apparatus includes a second server that authorizes session requests of the client for the first server. A plurality of records of resource allocation data is coupled with the second server. Each record indicates whether a session may be established between the client and the first server. Coupled to the second server is information that associates an entity that includes and is associated with one or more clients, and information that associates the second server to a third server that is authoritative for the second server and the associated clients. Means are provided for receiving a request to establish a session between the client and the first server and for determining, at the second server, based on one of the records that is associated with the client, whether the session may be established when the client is associated with the entity. Also provided are means for informing the first server that the session is authorized only when the second server determines from the one of the records that the session may be established. Although the first, second and third servers have been described as separate servers the functions performed by two or more of the servers may actually be combined in a single server unit.
    • 描述了一种与连接到网络中的第一服务器的客户端一起使用的授权装置。 授权装置包括授权客户端针对第一服务器的会话请求的第二服务器。 资源分配数据的多个记录与第二服务器耦合。 每个记录指示是否可以在客户端和第一个服务器之间建立会话。 耦合到第二服务器的是将包括并与一个或多个客户端相关联的实体关联的信息,以及将第二服务器与对于第二服务器和相关联的客户端具有权威性的第三服务器相关联的信息。 提供了用于接收在客户端和第一服务器之间建立会话的请求的装置,并且用于在第二服务器处,基于与客户端相关联的记录中的一个来确定该会话是否可以在客户端是 与实体相关联。 还提供了用于通知第一服务器仅当第二服务器从记录中的一个确定会话可被建立时才允许该会话被授权的装置。 虽然第一,第二和第三服务器已经被描述为单独的服务器,但是由两台或多台服务器执行的功能实际上可以组合在单个服务器单元中。